Samuel w



UNITED sTATEs PATENT oEEroE.

SAMUEL'W.' LOWE, OF"PHILADELPHIA,' PENNSYLVANIA, ASSIGNOR TO HIMSELF ANDWM. F. SCHEIBIBE.

PRINTINGQPRESS.

To all whom fit may conccm:

Be it known that I, SAMUEL'y W. LOWE, of

'the `city of Philadelphia and State of Pennsylvania,`.have invented..certain Improvements in- Print-ing-"lresse-s;` and I do hereby declarethat 'the'fo'llowing' is' al' full, clear, and exact description of thesame, reference being-.had to the iaccompanying drawing and to theletters of reference marked thereon.

My invention relates to` improvements in small portable printingpresses, in which a radiating cone shaped roller, is used for giving therequired impression, and consists in a means of so adjusting the conicalroller as to easily adapt it t0 the surface of the type from which theimpression has to be taken. Inconnection with the conical roller I alsoemploy a spring tympan, so arranged in respect to the roller, and itscenter of radiation, that on turning the said roller in the direction ofthe tympan, the latter will be depressed over the type, and on turningthe roller away from the tympan the latter will, by means of its springbe raised and thus allow the paper to be placed readily upon the type.

In order to enable others skilled in the art to make and use myinvention I will now proceed to describe its construction and operation.

On reference to t-he drawing which forms a part of this specification,Figure l is a sectional elevation of my improved portable printing presswith the conical roller directly over the type; Fig. 2, a ground plan ofFig. 1, and, Fig. 3, an external elevat-ion of the press with the rollerremoved from the tympan, and in a position at right angles to the same,and the tympan consequently through the action of the spring raised fromthe type.

The above views (in which the same letters of reference allude tosimilar parts) are drawn one half. 'the full size of the press.

A is the basep'late of the press the shape of which is represented inthe plan view Fig. 2. Intothe projecting portion a of this plate isscrewed, or otherwise secured the vertical spindle B, and toward the topof the latter fits accurately, but so as to turn freely thel end of theradial lever C,between which and the base plate and surrounding the saidvertical spindle intervenes a spiral spring e, the latter having atendency to keep the end of the radial lever pressed upward against thenuts f, f,which are adapted to the screwed portion it of the verticalspindle B. The end'of the' lever C is furnished with an operating"handle c, and from the underside of the lever project two brackets z'and j, the former serving as aloose bearing `for the spindle D, and thelatter having an 'oblong slot through which passes the opposite end yoflthe same spindle; the eX@ treme end of which is screwed, and has a nutd, which in conjunction with the collar on the other end, in theprojection z' serves to keep the said spindle always in the samelongitudinal position. 'Near the end of the lever C is a screw 7o,projecting with its point into the slot (already mentioned) of thebracket j and bearing against the shaft D; on the latter and between thetwo brackets 2f and is the roller F which tapers t0- ward the center o-fthe vertical spindle B. This roller is so arranged that on turning it onits center of radiation (that is the shaft B) its surface shall alwayscoincide with that of the type E which is attached to the base plate Ain any convenient manner.

Gr is the tympan frame made of a piece of wire and bent in the formshown in Fig. 2; from this wire project pieces m, m. These are turnedand bent into orifices in the base plate A, thus forming a hinge for thetympan. Across the tympan wires .is stretched the blanket H, saidblanket being formed of the substances usually employed for similarpurposes. Attached to the wire G which composes the tympan frame, atpoints indicated in F 2, are the ends of the spiral spring whichsurrounds a protecting ferrule y/ partially inclosing the spiral springe. The object of this spiral spring m, in its tendency to raise up thetympan when the latter is not depressed by the action of the roller Fwill be apparent as the moment the roller is removed from the tympan,the latter will rise by the action of the said spiral spring.

Operation: When the above described apparatus has to be used forprinting, the operator in the first instance grasps the handle c of theradial lever C, -and moves itl either to the right or to ther left sothat it shall be clearvof the tympan wire G. The latter immediately,through the spiral spring rises to the position shown in Fig.

3, and allows the printer every opportunity of distributing the inkoverv the type, and afterward placing the paper on the same, then ondrawing the lever C in the direction of the tympan, the roller F will inthe 'first .instance depress the same, and afterward passing over thecloth leave the desired impression on the paper.

I would here remark that I am aware that radiating conical rollers havebeen used for giving impressions on plain surfaces,

but the difficulties of using such conical rollers have hitherto beenthis, that yin constant use the central point of radiation springs oryields, and consequently the surface of the conical roller has not thedesired effect on the surface of the tympan, as the slightest yieldingof the lever consequent upon the weakness of the vertical spindle B mustcause a corresponding lightness on the extreme surface of the type E.

By my arrangement of parts the moment the roller F does not performefieient duty on the outside of the type E `it, can soon be rectied bythe regulating of the screw 7c.

I do not desire to claim the employment of a cone shaped roller forgiving impressions, well knowing that the same has been employed before.But

/Vhat I claim and desire to secure by Letters Patent is,-

1. The adjusting of the conical roller F by means of the screw /c asherein specified.

2. The radiating lever C with its conical roller F in combination withthe tympan and its `spring lthe whole being arranged substantiallyA inthe manner and for the purpose herein set forth.

SAM. w. Lown.

Vitnesses:

HENRY HowsoN, WILLIAM E. VVALTON.

